Okay, so imagine you have a really big and tough toy robot. You want to make it even bigger and tougher so you start adding more parts to it. You keep adding more parts until it becomes so big and tough that it's almost too much for you to handle.
That's kind of like what a macho project is. It's when people try to make something bigger and tougher than it needs to be. They keep adding more things to it until it becomes too complicated and difficult to manage.
In the real world, this can happen with things like big construction projects or software development. Sometimes people want to make something that's really impressive or cutting-edge, but they end up making it so complicated that it's hard for anyone to use or understand.
So, in summary, a macho project is when people try to make something bigger and tougher than it needs to be, and end up making it too complicated to manage effectively.